Formation of bedded manganese deposits in the Kuruman area, South Africa, is attributed to near-surface enrichment by circulating meteoric waters of a slightly manganiferous limestone zone intercalated in late Precambrian banded ironstones of the upper Griquatown series. Braunite-or cryptomelane-rich ores predominate, but masses of crystalline hausmannite and a few jacobsite boulders are also present.

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